not professional; not pertaining to or characteristic of a profession.

at variance with or contrary to professional standards or ethics; not befitting members of a profession, as language, behavior, or conduct.

not belonging to a profession; nonprofessional.

not done with professional competence, as a play staged or an opera performed by amateurs; amateurish.

Sports . nonprofessional ( def. 2 ) .

a person who is not a professional; amateur.

adjective

experienced , expert , professional , skilled

adjective

amateur , amateurish , ignorant , improper , inadequate , incompetent , inefficient , inexperienced , inexpert , lax , negligent , nonexpert , unethical , unfitting , unsuitable , untrained , unworthy , dilettante , dilettantish , nonprofessional , unskilled , unskillful , shoddy , sloppy , unprincipled